Latitude & Longitude (WGS84):
48° 29' 26'' North , 122° 39' 23'' West
Latitude & Longitude (decimal):
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Long-form identifier:
mindat:1:2:69578:6
A copper-silver-gold prospect located 3 1/2 southwest of the center of Anacortes on Fidalgo Island but just within city limits. It worked mineralized disseminations and fractures in granite. Development includes 8 small shafts.
Tectonics: Active Margin (Leading Edge Of North American Plate). Accreted Terrane
Deposit: Copper is disseminated and in fractures in shear zone in granite. Expected deposit types in this region are low-sulfide Au quartz veins, of which this deposit may be one, although a granitic host rock is not typical. What little descriptive information is available suggests a porphyry copper deposit, but they are not present in this environment. It may be a polymetallic vein, but the deposit type is really unknown
Deposit type: Polymetallic veins
Ore(s): Fractures In Shear Zone
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2 valid minerals.
Rock Types Recorded
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References
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.
doi:10.2138/am-2024-9486.
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Current server date and time: April 4, 2026 10:13:34
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